With speed, agility and planning the player can often just head to the mission objective and do what is required to complete it. There are very few enemy kills that are required to complete main missions. Some missions with the compass icon in the player’s log are actually optional and are usually to do with special rewards or similar errands. Main missions have a compass picture icon in the player’s log. The player can refer to these at any time for help. A mission message will also be placed in the player’s log. The next mission will be shown on the player’s PDA and a red icon will be placed on the map showing the location of the next mission. When a main mission has been completed the next main mission required to proceed in the game will be given to the player.
Most of the main missions will have to be completed to be able to move on in the game.
The Main missions in Clear Sky form part of the storyline of the game and each main mission completed will guide the player through the story as it unfolds.